Improvement in filters



".FEERS. PHOTO-LITHOGRAPHER. WASHINGTON, D. G4

tant

weee-aww CHARLES H. JACKSON, or S11-LouisMissounir.'A

Lette/rs Patent No. 85,449,7'datecl December 2 9, 1868; antedated.December 17 1868.

IMPROVEMENT IN FILTERS.

The Schedule referred to ln these Lettera Patent and making part of thesame.

is a full and clear description thereof, reference being had to theaccompanying drawings, and to the letters 'of reference marked thereon.

The nature of this invention consists in providing a central chamber forthe filtered Water, which chamber may also be used for a cooler, thesaid chamber being surrounded by an annular filtering-chamber, throughwhich the water filters downward, andv enters the clear-I water chamberat the bottom.

To enable those skilled in the art to make and use my improved filter, Iwill proceed to describe its construction and operation.

Figure 1, of the drawings, is a central sectional elevation of theimproved filter. A

Figure 2 is a sectional plan of the same, taken on the line x-y of fig.1.

A is the outer wall of the lter, which, for convenience and economyssake, is made circular inform.

lt is evident, however,that any other form would be equally well adaptedfor the contour of the filter; consequent-ly the circular' form onlywill be described.

VVit-hin the outer wall A', and concentric with it, is another verticalwall, B, which subdivides 4the interior into two vertical compartments,C and D.

The inner one of these compartments, C, is the clear- -water chamber,and, at the same time, serves as a cooler.

The annular chamber D surrounds the said chamber C, and extends from thetop to the bottom of the apparatus.

lhe chamber D may be of a width of, say, two or three inches, more orless.

Attached to the exterior of the wall B are to be two or more horizontalwalls,' B, annular .in plan, and having vertical walls, B?, attached totheir peripheries, the said Vertical walls being concentric with theWalls A and B, and just far enough removed from the former to allow the'inner vessel B B B2 to be easily set into or removed from theenclosing-vessel A.

This construction of the said walls'B Bl B2 forms filtering-chambers l)b. Into the upper one (or ones, if more than two be used,) gravel orsand will be placed, and into the lower one, charcoal. The unfilteredwater will be poured into the upper part of the'chamber D, above thetilter b, and will pass down through the said filter, and through theupper one of the bottoms B, which is perforated in one or two places, asat b2 in iig. 2, and thence/down into and through the filter b in thesame manner.

. Small tubes orspouts, b3, should be used to conductl the water fromtheperforations b2 vof the upper filter', down into the next lower one, inorder, to prevent slopping the water into the passage between the WallsA and B.

lA11 annular strainer, F, is to be placed over the top of the filter-b,to catch the bulk of the sediment.

This strainermay be constructed of coarse Woollen cloth, or Wire cloth,and may very/.easily be removed and Washed, without disturbing theltering-r'naterial in l) and b'. This renders the filter peculiarlyapplicable to filtering very muddy water.

The inner chamber G, into which the clear water runs through theapertures b* from the filter bl, is well 'adapted to lthe purposes of acooler, as'it is protected the filtering-chambers l) and b, andotherwise arranged,

as herein shown and described.

' CHAS. H. JACKSON. Witnesses: M. RANDOLPH,

GEO. W. HERBERT.

